Search Results - "SZYBIST, James P"

Catalytic Exhaust Gas Recirculation-Loop Reforming for High Efficiency in a Stoichiometric Spark-Ignited Engine through Thermochemical Recuperation and Dilution Limit Extension, Part 1: Catalyst Performance by Chang, Yan, Szybist, James P, Pihl, Josh A, Brookshear, D. William

“…The use of fuel reformate from catalytic processes is known to have beneficial effects on the spark-ignited combustion process through enhanced dilution…”
Get full text

Catalytic Steam and Partial Oxidation Reforming of Liquid Fuels for Application in Improving the Efficiency of Internal Combustion Engines by Brookshear, D. William, Pihl, Josh A, Szybist, James P

“…This study investigated the potential for catalytically reforming liquid fuels in a simulated exhaust gas recirculation (EGR) mixture loop for the purpose of…”
Get full text

Hydrocarbon and particulate matter evolution in the exhaust manifold of a spark-ignited engine under cold-start operation by Jatana, Gurneesh S, Chuahy, Flavio Dal Forno, Park, Yensil, Lobodin, Vladislav, Moses-DeBusk, Melanie, Szybist, James P

“…Cold-start, as defined by the time between first engine crank and three-way catalyst light-off, is responsible for a large percentage of NOx, unburned…”
Get full text

Pressure and temperature effects on fuels with varying octane sensitivity at high load in SI engines by Szybist, James P., Splitter, Derek A.

“…The octane sensitivity (S), defined as the difference between the Research Octane Number (RON) and the Motor Octane Number (MON), is of increasing interest in…”
Get full text

Understanding chemistry-specific fuel differences at a constant RON in a boosted SI engine by Szybist, James P., Splitter, Derek A.

“…The goal of the US Department of Energy Co-Optimization of Fuels and Engines (Co-Optima) initiative is to accelerate the development of advanced fuels and…”
Get full text

Insights into engine autoignition: Combining engine thermodynamic trajectory and fuel ignition delay iso-contour by Tao, Mingyuan, Zhao, Peng, Szybist, James P., Lynch, Patrick, Ge, Haiwen

“…One of the ultimate goals of chemical kinetic study is to understand and predict autoignition in engines. In this study, utilizing toluene primary reference…”
Get full text

Modeling pre-spark heat release and low temperature chemistry of iso-octane in a boosted spark-ignition engine by DelVescovo, Dan A., Splitter, Derek A., Szybist, James P., Jatana, Gurneesh S.

“…Recent trends among automotive manufacturers towards downsized, boosted engines make it imperative to understand specific fuel chemistry interactions…”
Get full text

Fuel property effects on low-speed pre-ignition by Jatana, Gurneesh S., Splitter, Derek A., Kaul, Brian, Szybist, James P.

“…[Display omitted] This work explores the dependence of fuel distillation and flame speed on low-speed pre-ignition (LSPI). Findings are based on cylinder…”
Get full text

Catalytic Exhaust Gas Recirculation-Loop Reforming for High Efficiency in a Stoichiometric Spark-Ignited Engine through Thermochemical Recuperation and Dilution Limit Extension, Part 2: Engine Performance by Chang, Yan, Szybist, James P, Pihl, Josh A, Brookshear, D. William

“…This is the second part of a two-part investigation of on-board catalytic fuel reforming to increase the brake efficiency of a multicylinder, stoichiometric…”
Get full text

An analysis of direct-injection spark-ignition (DISI) soot morphology by Barone, Teresa L., Storey, John M.E., Youngquist, Adam D., Szybist, James P.

“…We have characterized particle emissions produced by a 4-cylinder, 2.0 L DISI engine using transmission electron microscopy (TEM) and image analysis. Analyses…”
Get full text

A highly efficient six-stroke internal combustion engine cycle with water injection for in-cylinder exhaust heat recovery by Conklin, James C., Szybist, James P.

“…A concept adding two strokes to the Otto or Diesel engine cycle to increase fuel efficiency is presented here. It can be thought of as a four-stroke Otto or…”
Get full text

Biodiesel combustion, emissions and emission control by Szybist, James P., Song, Juhun, Alam, Mahabubul, Boehman, André L.

“…The use of biodiesel is rapidly expanding around the world, making it imperative to fully understand the impacts of biodiesel on the diesel combustion process,…”
Get full text

Effects of Fuel Composition on EGR Dilution Tolerance in Spark Ignited Engines by Szybist, James P., Splitter, Derek

“…Fuel-specific differences in exhaust gas recirculation (EGR) dilution tolerance are studied in a modern, direct-injection single-cylinder research engine. A…”
Get full text

Impact of fuel chemical function characteristics on spark assisted and kinetically controlled compression ignition performance focused on multi-mode operation by D.F. Chuahy, Flavio, Powell, Tommy, Curran, Scott J., Szybist, James P.

“…•Fuel RON and octane sensitivity did not define fuel performance in either advanced combustion mode.•Both advanced combustion modes required substantial intake…”
Get full text

The Reduced Effectiveness of EGR to Mitigate Knock at High Loads in Boosted SI Engines by Szybist, James P., Wagnon, Scott W., Splitter, Derek, Pitz, William J., Mehl, Marco

“…Numerous studies have demonstrated that exhaust gas recirculation (EGR) can attenuate knock propensity in spark ignition (SI) engines at naturally aspirated or…”
Get full text

Impact of engine pressure-temperature trajectory on autoignition for varying fuel properties by Szybist, James P., Splitter, Derek A.

“…•OI is a superior SI knock metric regardless of thermodynamic PT trajectory.•OI remains valid for SI combustion with unconventional biofuel chemistries.•OI…”
Get full text

Experimental Investigation of Spark-Ignited Combustion with High-Octane Biofuels and EGR. 2. Fuel and EGR Effects on Knock-Limited Load and Speed by Splitter, Derek A, Szybist, James P

“…The present study experimentally investigates spark-ignited combustion with 87 AKI E0 gasoline in its neat form and in midlevel alcohol–gasoline blends with…”
Get full text

Analysis of the Impact of Selected Fuel Thermochemical Properties on Internal Combustion Engine Efficiency by Szybist, James P, Chakravathy, Kalyana, Daw, C. Stuart

“…In this study we model the effects of 23 different fuels on First and Second Law thermodynamic efficiencies of an adiabatic internal combustion engine. First…”
Get full text

Experimental Investigation of Spark-Ignited Combustion with High-Octane Biofuels and EGR. 1. Engine Load Range and Downsize Downspeed Opportunity by Splitter, Derek A, Szybist, James P

“…The present study experimentally investigates spark-ignited combustion with 87 AKI E0 gasoline in its neat form and in midlevel alcohol–gasoline blends with…”
Get full text

Premixed ignition behavior of alternative diesel fuel-relevant compounds in a motored engine experiment by Szybist, James P., Boehman, André L., Haworth, Daniel C., Koga, Hibiki

“…A motored engine study using premixed charges of fuel and air at a wide range of diesel-relevant equivalence ratios was performed to investigate autoignition…”
Get full text